Make an inventory by function
The former address referred to an Ercuis set containing 71 pieces. That describes the topic of an archived listing, not a set currently offered for sale. For a comparable purchase, count each utensil type separately. The total alone does not show how many complete settings you can put on a table.
Compare pattern and marks
Line up matching functions and compare length, decoration and handle shape. Request clear photographs of maker’s marks and other inscriptions. A set can include replacements or examples from different production periods. If the Ercuis attribution or Art Deco dating affects your decision, ask for the evidence supporting it.
Assess wear and future matching
Look at fork tips, spoon bowls and handle joints, and request details of repairs. Polishing does not resolve loss of plating. Keep front-and-back photographs and measurements of the exact pieces you need to replace. For a restaurant, specify quantity and acceptable differences before requesting additions; a single matching example does not establish the availability of a complete series.
For the next part of your selection, read Silver plate marks and condition: a buying guide.